package com.xw.musicplayer.floatView;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.view.View;

import com.xw.musicplayer.R;

public class FloatRoundSeekBar extends View {
    /**
     * 画笔对象的引用
     */
    private Paint paint;

    /**
     * 圆环的颜色
     */
    private int roundColor;

    /**
     * 圆环进度的颜色
     */
    private int roundProgressColor;

    /**
     * 中间进度百分比的字符串的颜色
     */
    private int textColor;

    /**
     * 中间进度百分比的字符串的字体
     */
    private float textSize;

    /**
     * 圆环的宽度
     */
    private float roundWidth;

    /**
     * 最大进度
     */
    private int max;

    /**
     * 当前进度
     */
    private int progress;
    /**
     * 是否显示中间的进度
     */
    private boolean textIsDisplayable;

    /**
     * 进度的风格，实心或者空心
     */
    private int style;

    public static final int STROKE = 0;
    public static final int FILL = 1;
    /**
     * 进度的风格，实心从下到上
     */
    public static final int FILL_UP = 2;
    private Context mContext;

    public FloatRoundSeekBar(Context context) {
        this(context,null);
    }

    public FloatRoundSeekBar(Context context, AttributeSet attrs) {
        this(context, attrs,0);
    }

    public FloatRoundSeekBar(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        mContext = context;
        init(attrs);
    }

    private void init(AttributeSet attrs) {

        paint = new Paint();
        TypedArray mTypedArray = mContext.obtainStyledAttributes(attrs, R.styleable.FloatRoundSeekBar);
        roundColor = mTypedArray.getColor(R.styleable.FloatRoundSeekBar_float_roundColor, Color.RED);
        roundProgressColor = mTypedArray.getColor(R.styleable.FloatRoundSeekBar_float_roundProgressColor, Color.GREEN);
        roundWidth = mTypedArray.getDimension(R.styleable.FloatRoundSeekBar_float_roundWidth, 5);
        textColor = mTypedArray.getColor(R.styleable.FloatRoundSeekBar_float_textColor, Color.GREEN);
        textSize = mTypedArray.getDimension(R.styleable.FloatRoundSeekBar_float_textSize, 15);
        max = mTypedArray.getInteger(R.styleable.FloatRoundSeekBar_float_max, 100);
        textIsDisplayable = mTypedArray.getBoolean(R.styleable.FloatRoundSeekBar_float_textIsDisplayable, true);
        style = mTypedArray.getInt(R.styleable.FloatRoundSeekBar_float_style, 0);
    }

    @Override
    public void draw(Canvas canvas) {
        super.draw(canvas);

        /**
         * 画最外层的大圆环
         */
        int centre = getWidth() / 2; // 获取圆心的x坐标
        int radius = (int) (centre - roundWidth / 2); // 圆环的半径
        paint.setColor(roundColor); // 设置圆环的颜色
        if (style == FILL_UP) {
            paint.setStyle(Paint.Style.FILL_AND_STROKE);
        } else {
            paint.setStyle(Paint.Style.STROKE); // 设置空心
        }

        paint.setStrokeWidth(roundWidth); // 设置圆环的宽度
        paint.setAntiAlias(true); // 消除锯齿
        canvas.drawCircle(centre, centre, radius, paint); // 画出圆环

        /**
         * 画圆弧 ，画圆环的进度
         */

        // 设置进度是实心还是空心
        paint.setStrokeWidth(roundWidth); // 设置圆环的宽度
        paint.setColor(roundProgressColor); // 设置进度的颜色
        RectF oval = new RectF(centre - radius, centre - radius, centre
                + radius, centre + radius); // 用于定义的圆弧的形状和大小的界限

        switch (style) {
            case STROKE:
                paint.setStyle(Paint.Style.STROKE);
                if (progress != 0) {
                    canvas.drawArc(oval, -90, 360 * progress / max, false, paint); // 根据进度画圆弧
                }
                break;
            case FILL:
                paint.setStyle(Paint.Style.FILL_AND_STROKE);
                if (progress != 0) {
                    canvas.drawArc(oval, -90, 360 * progress / max, true, paint); // 根据进度画圆弧
                }
                break;
            case FILL_UP:
                paint.setStyle(Paint.Style.FILL_AND_STROKE);
                if (progress != 0) {
                    int angle = 360 * progress / max;
                    if (angle / 2 < 90) {
                        angle = Math.abs(90 - angle / 2);
                    } else {
                        angle = 360 - Math.abs(90 - angle / 2);
                    }
                    canvas.drawArc(oval, angle, 360 * progress / max, false, paint);
                }
                break;
        }

        /**
         * 画进度百分比
         */
        if (textIsDisplayable) {
            paint.setStrokeWidth(0);
            paint.setColor(textColor);
            paint.setTextSize(textSize);
            paint.setTypeface(Typeface.DEFAULT_BOLD); // 设置字体
            int percent = (int) (((float) progress / (float) max) * 100); // 中间的进度百分比，先转换成float在进行除法运算，不然都为0
            float textWidth = paint.measureText(percent + "%"); // 测量字体宽度，我们需要根据字体的宽度设置在圆环中间

            if (percent != 0) {
                canvas.drawText(percent + "%", centre - textWidth / 2, centre
                        + textSize / 2, paint); // 画出进度百分比
            }
        }
    }

    public synchronized int getMax() {
        return max;
    }

    /**
     * 设置进度的最大值
     *
     * @param max
     */
    public synchronized void setMax(int max) {
        if (max < 0) {
            throw new IllegalArgumentException("max not less than 0");
        }
        this.max = max;
    }

    /**
     * 获取进度.需要同步
     *
     * @return
     */
    public synchronized int getProgress() {
        return progress;
    }

    /**
     * 设置进度，此为线程安全控件，由于考虑多线的问题，需要同步 刷新界面调用postInvalidate()能在非UI线程刷新
     *
     * @param progress
     */
    public synchronized void setProgress(int progress) {
        if (progress < 0) {
            throw new IllegalArgumentException("progress not less than 0");
        }
        if (progress > max) {
            progress = max;
        }
        if (progress <= max) {
            this.progress = progress;
            postInvalidate();
        }

    }

    public int getCircleColor() {
        return roundColor;
    }

    /**
     * 设置圆环的颜色
     */
    public void setCircleColor(int circleColor) {
        this.roundColor = circleColor;
    }

    public int getCircleProgressColor() {
        return roundProgressColor;
    }

    /**
     * 设置圆环进度的颜色
     */
    public void setCircleProgressColor(int circleProgressColor) {
        this.roundProgressColor = circleProgressColor;
    }

    public int getTextColor() {
        return textColor;
    }

    /**
     * 设置中间进度百分比的字符串的颜色
     */
    public void setTextColor(int textColor) {
        this.textColor = textColor;
    }

    public float getTextSize() {
        return textSize;
    }

    /**
     * 设置中间进度百分比的字符串的字体大小
     */
    public void setTextSize(float textSize) {
        this.textSize = textSize;
    }

    public float getRoundWidth() {
        return roundWidth;
    }

    /**
     * 设置圆环的宽度
     */
    public void setRoundWidth(float roundWidth) {
        this.roundWidth = roundWidth;
    }

    /**
     * 设置是否显示数字百分比
     *
     * @param flag
     */
    public void setTextIsDisplayable(boolean flag) {
        textIsDisplayable = flag;
    }

    /**
     * 设置进度风格
     * 0空心，1实心，2实心从下到上
     * @param style
     */
    public void setStyle(int style) {
        this.style = style;
    }
}
